Abstract
In this paper, experiment platform for cavity flow is built in low-turbulence wind tunnel. based on the measurement of
wall static pressure and sound pressure with microphones, the basic flow oscillation characteristics of different type cavity
in low speed are studied. The effect of geometry parameters of length to depth ratio and width to depth ratio on cavity
flow pattern and noise characteristics is obtained. The results show that in the incompressible flow state, the basic flow
pattern of cavities is not affected by flow velocity; length-to-depth ratio of 1 to 12 covers the flow pattern from open to
close, and with the length-to-depth ratio increase, the cavity radiation SPL increases; with aspect ratio increase, the sound
pressure energy of cavity also increase
AbstractIn this paper, experiment platform for cavity flow is built in low-turbulence wind tunnel. based on the measurement ofwall static pressure and sound pressure with microphones, the basic flow oscillation characteristics of different type cavityin low speed are studied. The effect of geometry parameters of length to depth ratio and width to depth ratio on cavityflow pattern and noise characteristics is obtained. The results show that in the incompressible flow state, the basic flowpattern of cavities is not affected by flow velocity; length-to-depth ratio of 1 to 12 covers the flow pattern from open toclose, and with the length-to-depth ratio increase, the cavity radiation SPL increases; with aspect ratio increase, the soundpressure energy of cavity also increase
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